It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 998 671 is not a prime number.
For example, 998 671 can be divided by 307: 998 671 / 307 = 3 253.
For 998 671 to be a prime number, it would have been required that 998 671 has only two divisors, i.e., itself and 1.
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998 671 is an odd number, because it is not evenly divisible by 2.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 998 671 is about 999.335.
Thus, the square root of 998 671 is not an integer, and therefore 998 671 is not a square number.
The square of a number (here 998 671) is the result of the product of this number (998 671) by itself (i.e., 998 671 × 998 671); the square of 998 671 is sometimes called "raising 998 671 to the power 2", or "998 671 squared".
The square of 998 671 is 997 343 766 241 because 998 671 × 998 671 = 998 6712 = 997 343 766 241.
As a consequence, 998 671 is the square root of 997 343 766 241.
The multiples of 998 671 are all integers evenly divisible by 998 671, that is all numbers such that the remainder of the division by 998 671 is zero. There are infinitely many multiples of 998 671. The smallest multiples of 998 671 are: